baber/WOPTO huggingface dataset:
Patent GB-1402490-A (GB)
Title: Hybrid switching devices for alternating currents
IPC: G05F1/56
Filed: 1973-04-25
Abstract: 1402490 Arcing preventing in switches J PFANZELT 25 April 1973 [8 May 1972 17 Aug 1972] 19779/73 Heading H1N An A.C. switching device comprises a first contactor I having its contacts I1 in series with a rectifier V, and a second contactor II having its contacts II1 in a load current path which does not include a rectifier, the contactor operating coils being connected in a control circuit M2 such that the contactor contacts I1 are closed first and opened last when the rectifier V is non- conducting and the contactor contacts II1 are closed last and opened first when the rectifier V is conducting. The contactors I, II may be bistable devices having closing coils IAn, IIAn and opening coils IAb, IIAb in a control circuit having oppositely poled diodes D1, D2 and Zener diodes Z1, Z2 with a closing control switch An and gauged opening control switches Ab1, Ab2. On operation of the switch An the coil IAn is energized during a portion of a half cycle determined by the diodes D1, Z1 to close the contacts I1. The contactor I closes auxiliary contacts I2 to energize the coil IIAn during a portion of a half cycle determined by the diodes D2, Z2 to close the contacts II1. Similarly operation of the opening switches causes energization of the opening coils in the correct sequence and at the correct times. A further main contactor HS may have its contacts connected across the contacts of both contactors I, II, and its operating coil connected in series with a closing switch Ab3 and auxiliary contacts II2 of the contactor II. Various arrangements for polyphase circuits are described and shown and the contactors I, II may have their contacts in series with oppositely poled rectifiers, the resulting series circuits being connected in parallel.
Patent GB-357979-A (GB)
Title: An improved fluid pressure pump, engine, or variable speed power transmitter or brake
IPC: F01B15/00
Filed: 1930-06-30
Abstract: 357,979. Fluid friction brakes. WARREN, R., 9, Fauconberg Road, Sutton Court, Chiswick, London. June 30, 1930, No. 19800. [Class 103 (i).] A pump or engine adaptable for use as a brake or variable speed power transmitter is provided with cylindrical oscillatable plugs G, Fig. 2, spaced apart in the rotor C and bored to receive plungers E, E<1>, E<2> mounted on a crank or eccentric pin D. The rotor may have a shrouding ring P, Fis. 4, fluid entering through passages K, M, N and discharging through a passage Q. A power transmitter may comprise a pump and motor each of the above construction, and be controlled by a valve or by varying the stroke or position of the crank or eccentric pin. Another form of power transmitter is shown in Fig. 6, and is controlled by an axially slidable sleeve T ; it may be combined with epicyclic gearing and a positive clutch.
Patent GB-768708-A (GB)
Title: Improvements in and relating to polyacrylonitrile solutions
Inventor: CAMERON WALTER GLEN
IPC: C08J3/03
Filed: 1955-07-06
Abstract: Polymers containing in the polymer molecule at least 80 per cent of acrylonitrile are dissolved in a solution of zinc chloride and calcium chloride in a mixture of water and at least one water-miscible aliphatic liquid containing one alcoholic hydroxyl group and not more than 6 carbon atoms in the molecule, e.g. methyl and ethyl alcohols, ethylene glycol monomethyl and monoethyl ethers, diacetone alcohol and ethyl lactate, the total weight of combined salts being at least 35 per cent of the solvent mixture.  A copolymer of acrylonitrile and methyl acrylate is specified.  Fibres are formed from the solutions by wet-spinning.
Patent GB-147834-A (GB)
Title: Improvements in processes of extracting oils from fatty substances
IPC: C11B1/00
Filed: 1920-07-09
Abstract: 147,834. Rogers, G. D. March 7, 1919, [Convention date]. Fats and fatty oils, extracting.-In the electrolytic extraction of cod-liver or other oil, the comminuted mass is sent by a pump 6 through tubes 1<a>, 1<b>, 1<c>, which, with axial electrodes 4a, 4<b>, 4<c>, form electrolytic cells; it then passes to a centrifugal or other separator 8. The tubes are preferably enclosed in a box 5 which may serve as a steam-jacket. Fluid may be added to the mass to make it flow satisfactorily, and common salt or other salt may be added to increase its conductivity.
Patent GB-187714-A (GB)
Title: Improvements in or relating to cartridge carriers
IPC: F42B39/02
Filed: 1921-07-25
Abstract: 187,714. Mills Equipment Co., Ltd., and Lethern, A. A. July 25, 1921. Pouches.-Relates to pouches or pockets for cartridges in clips or for similar articles, of the kind in which the opening of the cover flap of the packet is limited by a strap connecting it to the pocket in order to prevent the loss of the cartridges if the pocket is inadvertently left open. According to the invention, the strap D is attached at both ends, at one end to the front wall C of the pocket and at the other end to the free end of the cover B. The middle part D<2> of the strap is preferably doubled on itself and stitched across to cause the strap to fold in or out when the cover is brought down and secured by a snap fastener E, E<1> or other means. Two straps in parallel or triangular formation may be used instead of one; or the single strap may be wide, even as wide as the pocket, in which case it may be constituted by an extension of the cover flap.
Patent GB-226458-A (GB)
Title: Improvements in connection with lawn mowing and rolling machines
IPC: A01D34/42
Filed: 1924-08-25
Abstract: 226,458. Sarel, W. G. M. Aug. 25. 1924. Rollers, land; rotary-tool machines; lifting tool frames manually.-Spiked rollers for piercing turf for ventilation and drainage purposes are combined with lawn rolling and mowing-machines, levers being provided for raising them out of action. The motor machine shown comprises two side plates or castings 1 carrying a motor 2. a mower 3, and a roller 4. A spiked roller 7 of the kind described in Specification 198,241 is mounted in arms 6 pivoted on the plates 1. It is weighted by weights 11 mounted on a spindle 10 carried by arms 9 extending upwardly from the arms 6. The roller 7 is lifted by means of a lever 12 pivoted on the handles 8 and provided with a locking-device 14. In a modification, the roller 7 is shorter than the roller 4, the arms 6 and handles 8 being connected to a transverse bar- In another arrangement in which the handles are dispensed with and a seat provided for the driver, the lifting-lever is pivoted on an extension of the frame and is operated by foot or hand. The mowing-apparatus may be dispensed with.
Patent GB-1121214-A (GB)
Title: An improved capacitive pickoff or transducer
IPC: G01N27/22
Filed: 1966-05-06
Abstract: 1,121,214. Capacitive transducers. CAMILLE BAUER MESSINSTRUMENTE A. G. May 6, 1966 [May 29, 1965], No. 20119/66. Heading G1N. A capacitive pick-up transducer comprises a differential capacitor input member D the capacitance of which changes according to changes of a sensed non-electrical physical quantity, and which is incorporated in a compensatory circuit wherein any change in the capacitance of the input member D is substantially compensated by a corresponding voltage dependent capacitance change of differentially connected "varicap" capacitors V. A movable element of the capacitor D may be coupled to a shaft (e.g. of an indicating instrument) the angular displacement of which is to be detected or measured. As shown the capacitors V, D form a bridge circuit connected in a feedback loop of an H. F. amplifier A1. A change in the shaft position causes temporary unbalance of the bridge, the output of which is fed to the amplifier A1 and affects the feedback, causing the amplifier to oscillate. An output from A1 is fed to a D.C. amplifier A2 which has an output current Ia corresponding to the amount of shaft displacement. The capacitors V are biased by a stabilized voltage from a D. C. source Q. The voltage drop across a resistor PM adds to the biasing voltage through a potentiometer PN and changes the capacitances V until the bridge returns to its original state of residual unbalance, a slight degree of unbalance being necessary to sustain the output current Ia. The biasing voltage may be adjustable by the potentiometer PN which permits a zero output current to be associated with any desired shaft position.
Patent GB-946807-A (GB)
Title: A radiation detector
IPC: H01J47/06
Filed: 1961-06-05
Abstract: 946,807. loriization counters. UNITED STATES ATOMIC ENERGY COMMISSION. June 5, 1961 [June 22, 1960], No. 20190/61. Heading H1D. [Also in Division G1] A gamma radiation detector comprises a gasproportional counter 14 at least partly screened by a material 18 which moderates γ-rays of 0.5 to 5 Mev. energy by the Compton scattering process. The counter preferably comprises a stainless steel wire anode disposed along the axis of a cylindrical envelope of aluminium, or glass having an opaque silver coating, which constitutes the cathode. External electrical leads and end portions of the cathode are shielded with aluminium foil. The tube contains 95% xenon and 5% CO 2  at a pressure of 1¢ atmospheres. The moderator is preferably of carbon and may be formed with one or more slits 19. Alternatively, a multi-slitted cylindrical moderator 22, Fig. 4, may be used, the slits not being diametrically opposed.
Patent GB-773921-A (GB)
Title: Improvements in or relating to commutator manufacture
IPC: B21D53/00
Filed: 1955-07-13
Abstract: 773,921. Making commutators. BOSCH GES., R. July 13, 1955 [July 16, 1954], No. 20225/55. Class 83 (2). [Also in Group XXXV] A commutator for a dynamo-electric machine is made from a metal strip 15 which is moved lengthwise intermittently and transverse grooves 16 are pressed therein whilst the strip is stationary to divide the latter into a plurality of sections 18 interconnected by thin bridging pieces 17, the sections are then each formed into the shape of a segment of a hollow cylinder, and upstanding tongues 20 are shaped out of the concave surfaces of the segments. The grooves 16 are formed by a first pressing tool 10 and the sections 18 are pressed into segmental form by a second tool 11. The tongues 20 are formed by a pair of transversely movable shaping tools. A section of grooved strip is then rolled to form a hollow cylinder, Fig. 2, and the hollow space between this cylinder and a core 19 is filled with an insulating plastic material which is firmly anchored therein by the tongues 20. The commutator is then fixed to the shaft of a dynamo-electric machine and the projecting bridging pieces 17 are machined off.
Patent GB-331104-A (GB)
Title: Improvements relating to the internal galvanisation of long hollow bodies
IPC: C25D7/04
Filed: 1929-07-02
Abstract: 331,104. Pfanhauser, W. A. F. July 2, 1929. Electrodes, moving.-In apparatus for internally plating a set of long hollow bodies such as tubes by travelling anodes of limited length, means are provided for simultaneously actuating all the anodes. In the apparatus shown each anode 2 is secured to a cable 8 passing round rollers 4 and tensioning rollers 11, the ends of the cable being joined by a detachable closure 3. The cables 8 are clamped in jaws 14 mounted on a transverse arm having at one end an internally threaded member 6 engaging a rotating screw 5 and resting at the other end on a guide rod, which serves as the anode connection. The member 6 engages guides, not shown, at the ends of its travel whereby the direction of rotation of the screw 5 is reversed automatically. The anodes are provided with insulating rings or stars 12. More than one anode may be mounted on each cable. The tubes 9 are mounted in tongs 10. The cable 8 may be enclosed in a rubber sheath.
Patent GB-228583-A (GB)
Title: Improvements in electric resistance welding
IPC: B23K11/24
Filed: 1923-08-10
Abstract: 228,583. Hadley, C. A., and Rose Street Foundry & Engineering Co., Ltd. Aug. 10, 1923. Phase, changing; transformers. - In electric resistance welding, the welding means is supplied with a compound alternating current obtained by supercurrents from a number of sources of supply of different frequency. In Fig. 1, single phase alternators A, B of identical construction but operating at different frequencies are connected to the primary windings a, c of identical transformers b, d the secondary windings e, f being connected in series with the primary winding g of the welding transformer h. In a modification, Fig. 3, there are two welding transformers h, h<1> and the transformers b, d have two secondary windings e, e<1>, f, f<1>. The secondary f is wound in the opposite direction to the windings e, e<1>, f<1>. In Fig. 2, the alternators A, B are connected to separate primary windings l, m of a single transformer n provided with two secondary windings o, p, connected in series and supplying the welding current. In a modification of this latter arrangement for supplying three welding machines, there are three transformers n and the alternators are replaced by two three-phase sources of supply of different frequencies. Specifications 9380/92 and 100,893 are referred to.
Patent GB-712252-A (GB)
Title: Improvements in and relating to means for reducing low frequency modulation in high frequency alternators
Inventor: GRAFF-BAKER WILLIAM SEBASTIAN
IPC: H04B1/12
Filed: 1951-08-29
Abstract: 712,252. Automatic control systems. BRITISH THOMSON-HOUSTON CO., Ltd. June 26, 1952 [Aug. 29, 19511, No. 20396/51. Class 38(4) To reduce low frequency amplitude modulation of the output voltage of a high frequency inductor alternator A, e.g. due to mechanical eccentricity, a voltage at the low frequency is produced across a suitable reservoir condenser C, of a full wave rectifier supplied from the alternator and including gas-filled rectifier diodes V1, V2. The voltage so developed is applied to a two-valve amplifier V3, V4 the output of which is injected through a transformer T2 into the excitation circuit of the alternator in the appropriate sense to neutralize the modulation. Frequency-selective negative feed-back is applied to the amplifier by a network C5 R6 to reduce amplifier output impedance at the high frequency. A choke may replace transformer T2.
Patent GB-361930-A (GB)
Title: Improvements in electric cables
IPC: H01B9/02
Filed: 1930-08-26
Abstract: 361,930. Cables. CALLENDER'S CABLE & CONSTRUCTION CO., Ltd., HUNTER, P. V., Hamilton House, Victoria Embankment, WATSON, J. F., Preston Lea, Woolwich Road, Abbey Wood, and BRAZIER, L. G., Hamilton House, Victoria Embankment, both in London. Aug. 26, 1930, Nos. 20406/31, 20407/31, and 20408/31. Divided on 358,190. [Class 36.] A multi-core 9 comprises conductors 10 elliptical in cross section and insulated with impregnated paper 11 applied in layers. The elliptical configuration of the conductor 10 rotates about the conductor axis along its length as shown in Fig. 4. Each core is covered with a metal-coated paper layer 12 and the cores are laid up with loose worming 13 to form a body of circular section. A circular lead sheath 16 of diameter slightly greater than that of the twisted cores covers the cable. In order to maintain the conductive layer 12 at sheath potential, a metal tape 14 with spring projections 15, Figs. 2 and 3, bridging the clearance space, is wound over the warmed-up cores. The projections 15 may be produced by stamping up the centre part of a tape 14, or a metallized fabric or paper tape may be threaded through by a wire or metal strip. The tape 14 may be applied as an open helix. The clearance space between the sheath 16 and laid-up cores may be filled in part with a gas which may be in flexible-walled containers. The Provisional Specifications describe similar constructions as applied to single core cables. Specification 350,714 is referred to.
Patent GB-650347-A (GB)
Title: Improved method of and apparatus for laundering clothes and the like
IPC: D06F31/00
Filed: 1948-05-03
Abstract: 650,347. Washing clothes. REEVE, T. D. Aug. 3, 1948, No. 20521. Addition to 582,001. Class 138 (ii)] The method and apparatus for laundering clothes disclosed in Specification 582,001 according to which the clothes are fed between a conveyer belt and a series of narrower guide belts first into a degreasing bath and then into an aqueous washing bath is modified by replacing the single conveyer belt with a number of smaller belts. Such smaller belts may be narrower than the original conveyer belt but each extending the whole length of the bath 1, as shown at 2 in Fig. 1, in which 5 are staggered guide belts. Alternatively, the smaller belts may be of full width as shown at 10 in Fig. 2, but may be shorter, passing round pairs of rollers 11, 12. A V-shaped guide plate 13 may be disposed between successive belts, or rotary brushes may be so disposed, or guide plates and rotary brushes may alternate across the width. Staggered guide belts 5 are provided as before, and a feed belt 7. In a modification, the wide belts 10 of Fig. 2 may be replaced by a series of narrow belts, arranged in staggered formation and each embracing a pair of rollers. In a further modification, Fig. 4, there are a series of narrow belts 20-23 arranged in staggered formation and each embracing 4 rollers, the rollers being arranged in pairs as shown. Between each pair of rollers is a rotating brush 25, or guide plates as in Fig. 2, may be used, or brushes alternating with guide plates.
Patent GB-499599-A (GB)
Title: Improvements relating to the protection of metal articles against corrosion by coating by electro deposition
IPC: C25D3/56
Filed: 1937-07-24
Abstract: 499,599. Electrodeposition of alloys. ROBERTS, S. T. July 24, 1937, No. 20538. [Class 41] Ferrous or other metal articles are protected against corrosion by electrodeposition of an alloy containing mercury and cadmium from an alkaline bath containing alurniniuxn in solution in addition to the constituents of the alloy. Suitable baths contain per gallon of water (i) sodium cyanide 12 oz, caustic soda 12 oz., zinc sulphate 10 oz., cadmium sulphate 4 oz., bichloride of mercury 2 oz., potassium aluminium sulphate 3¢ oz., dextrine 2 oz., ammoniated glycerine 1“ gms. ; (ii) sodium cyanide 12 oz., caustic soda 12 oz., cadmium sulphate 12 oz., bichloride of mercury ¢-2 oz., potassium aluminium sulphate 2 oz., cobalt sulphate “-2 oz., dextrine 2 oz.; (iii) sodium cyanide 12 oz., caustic soda 12 oz., cadmium sulphate 12 oz., bichloride of mercury ¢-2 oz., potassium aluminium sulphate 2 oz., nickel sulphate “-2 oz., dextrine 2 oz. The anode may consist of an alloy or mixture of zinc, cadmium and mercury in the ratio 8 : 4 : 1 or 8 : 2 : 1, or of cadmium and mercury in the ration 9 : 1 or it may consist of an inner tube of zinc and mercury and an outer tube of cadmium and mercury secured to an intervening conductive support. A cadmium anode may be carried. by a cobalt or nickel member. The articles to be plated are suspended by aluminium carriers which preferably penetrate into the recesses of the articles. The articles are preferably connected as anodes for a short period before connection as cathodes for plating. Undue prolongation of the cathodic step produces a friable deposit which may be brushed off from the underlying coating. The container may be a glass-lined steel tank.
Patent GB-243287-A (GB)
Title: Improvements relating to metallic nibs for pens
IPC: B43K1/02
Filed: 1925-08-17
Abstract: 243,287. Hughes, H. R. Aug. 17, 1925. Pen nibs.-Corrugations, ribs, or depressions 7 are formed in the body of a pen-nib between the writing- point and the slot or slots 4, 5 which determine the point of flexion, in order to prevent bending 'of the nib at a point other than that determined by the position of the slots. The depressions, which may terminate at or merge into the side edges of the nib, are formed as near to the writing-point as possible and extend in a longitudinal direction, being preferably slightly inclined or bent inwardly towards. the central line of the nib.
Patent GB-154317-A (GB)
Title: A new or improved appliance for poaching eggs
IPC: A47J29/04
Filed: 1919-08-23
Abstract: 154,317. Chapman, F. J., and Cullen, F. W. Aug. 23, 1919. Egg-cooking apparatus.- In an egg-poacher of the type comprising a baseplate b, a central standard a and a sliding frame c carrying rings d adapted normally to rest on the base-plate and to be raised to allow the poached eggs to be easily removed, a hook c or the like is provided to retain the frame and rings in a raised position when desired.
Patent GB-202642-A (GB)
IPC: B28C5/38
Filed: 1923-08-15
Abstract: 202,642. Dorr Co., Inc. Aug. 15, 1922, [Convention date]. Jet apparatus.-Cement is mixed in a container 1 by means of a circulating device consisting of a jet of air supplied by a pipe 10 and issuing from an orifice 11, the induced stream passing up a hollow rotating shaft 6 and being distributed through perforated arms 8, or branches 2. The shaft 6 is provided with stirrers 7 and the mixture in the container is agitated by air jets from perforations 4.
Patent GB-1427521-A (GB)
Title: Shoe drum brakes for vehicles
IPC: F16D51/20
Filed: 1972-05-04
Abstract: 1427521 Shoe drum brakes GIRLING Ltd 2 May 1973 [4 May 1972] 20820/72 Heading F2E In an internal shoe drum brake wherein arcuate shoes 1, 2 mounted on a stationary back-plate 4 are separated, by a service actuator 7, at one pair of adjacent ends thereof to bring them into engagement with a rotatable drum and at the other pair of adjacent ends by a mechanical parking actuator 10, and abutments are provided at the actuator 10 to take the braking loads when the brake is applied by the service actuator, and means are provided in or adjacent the service actuator for transmitting servo braking forces from one shoe to the other when the brake is applied by the mechanical parking actuator, the said other end of each shoe has first and second load bearing faces 2a, 3a and 2b, 3b, and the parking actuator incorporates expander means, i.e. tappets 8, 9, acting directly on the load bearing faces 3a, 2a. The abutments, i.e. the opposite ends of the housing of the actuator 10, are independent of the tappets 8, 9 and are engageable by the load bearing faces 2b, 3b when the brake is applied by the service actuator 7 so that braking forces on the shoes are taken directly by the abutments independently of the tappets when the brake is applied by the actuator 7. A force is applied to the shoes by the release of energy stored in the parking actuator upon operation of an actuating member, and the force is applied continuously to urge the shoes into engagement with the drum when the actuating member is operated irrespective of the initial position of the shoes. As shown, the parking actuator comprises a normally retracted plunger 13 acted upon by a spring 16 and which, when released, acts through a wedge 12 and rollers 11, to spread apart the shoes 1, 2. The servo force is applied from one shoe to the other during a parking application of the brake by a strut extending between the shoes or through the pistons 18, 19 of the actuator 7. The latter includes provision for automatic slack adjustment comprising a spindle 20 one end of which is in screw-threaded engagement with the piston 18, the other end of the spindle being a sliding fit in the piston 19 and carrying a drive ring 24 urged by a spring 25 into clutching engagement with a coned surface 26 on the piston 19. During service actuation when the pistons 18, 19 are moved apart more than a predetermined amount the drive ring 24 is moved away from the piston 19 to reduce the clutching force and rotates as the spindle moves axially therethrough thereby automatically increasing the distance between the pistons. In a modification, the parking actuator comprises toggle members (29), (30), Fig. 5 (not shown), in rocking abutment with a recess (31) in the plunger 13 which, for actuation thereof, is connected by a cable or rod extending via a bell-crank lever (37), Fig. 6 (not shown), to either a hand lever working in a gate or a hand lever carrying a pawl working over a toothed segment; the plunger may be released by air pressure or applied by fluid pressure with a reserve or back-up pressure accumulator.